Microwave surface resistance measurements on the heavy fermion superconductor UPt3

C. T. Lin; Bimal K. Sarma; J. B. Ketterson

doi:10.1016/S0375-9601(99)00520-4

Microwave surface resistance measurements on the heavy fermion superconductor UPt₃

C. T. Lin^*, Bimal K. Sarma, J. B. Ketterson

^*Corresponding author for this work

Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

Abstract

The relative change of the microwave surface resistance has been measured as a function of temperature in the superconducting and normal states of UPt₃ using a cavity perturbation technique. With our frequency range of ∼9-38 GHz, the microwave photon energy (ℏω) is ∼20-95% of the estimated zero-temperature (BCS) energy gap (2Δ₀) of UPt₃. The surface resistance shows a change in slope as the signature of T_C and has a significantly weaker temperature dependence in the superconducting state than would be predicted by the Mattis-Bardeen theory. At higher frequencies, the slope tends to change by a smaller amount. No indication of collective modes at any of the frequencies was observed down to the lowest temperatures measured (∼0.1 K).

Original language	English (US)
Pages (from-to)	424-428
Number of pages	5
Journal	Physics Letters, Section A: General, Atomic and Solid State Physics
Volume	260
Issue number	5
DOIs	https://doi.org/10.1016/S0375-9601(99)00520-4
State	Published - 1999

ASJC Scopus subject areas

Physics and Astronomy(all)

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10.1016/S0375-9601(99)00520-4

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@article{19cbd3bad34e44228596b2843f5428d7,

title = "Microwave surface resistance measurements on the heavy fermion superconductor UPt3",

abstract = "The relative change of the microwave surface resistance has been measured as a function of temperature in the superconducting and normal states of UPt3 using a cavity perturbation technique. With our frequency range of ∼9-38 GHz, the microwave photon energy (ℏω) is ∼20-95% of the estimated zero-temperature (BCS) energy gap (2Δ0) of UPt3. The surface resistance shows a change in slope as the signature of TC and has a significantly weaker temperature dependence in the superconducting state than would be predicted by the Mattis-Bardeen theory. At higher frequencies, the slope tends to change by a smaller amount. No indication of collective modes at any of the frequencies was observed down to the lowest temperatures measured (∼0.1 K).",

author = "Lin, {C. T.} and Sarma, {Bimal K.} and Ketterson, {J. B.}",

note = "Funding Information: This research was supported by the National Science Foundation under grant DMR 96-23682; use was made of the facilities of the Northwestern Materials Research Center under NSF grant DMR 96-32472. ",

year = "1999",

doi = "10.1016/S0375-9601(99)00520-4",

language = "English (US)",

volume = "260",

pages = "424--428",

journal = "Physics Letters, Section A: General, Atomic and Solid State Physics",

issn = "0375-9601",

publisher = "Elsevier",

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TY - JOUR

T1 - Microwave surface resistance measurements on the heavy fermion superconductor UPt3

AU - Lin, C. T.

AU - Sarma, Bimal K.

AU - Ketterson, J. B.

N1 - Funding Information: This research was supported by the National Science Foundation under grant DMR 96-23682; use was made of the facilities of the Northwestern Materials Research Center under NSF grant DMR 96-32472.

PY - 1999

Y1 - 1999

N2 - The relative change of the microwave surface resistance has been measured as a function of temperature in the superconducting and normal states of UPt3 using a cavity perturbation technique. With our frequency range of ∼9-38 GHz, the microwave photon energy (ℏω) is ∼20-95% of the estimated zero-temperature (BCS) energy gap (2Δ0) of UPt3. The surface resistance shows a change in slope as the signature of TC and has a significantly weaker temperature dependence in the superconducting state than would be predicted by the Mattis-Bardeen theory. At higher frequencies, the slope tends to change by a smaller amount. No indication of collective modes at any of the frequencies was observed down to the lowest temperatures measured (∼0.1 K).

AB - The relative change of the microwave surface resistance has been measured as a function of temperature in the superconducting and normal states of UPt3 using a cavity perturbation technique. With our frequency range of ∼9-38 GHz, the microwave photon energy (ℏω) is ∼20-95% of the estimated zero-temperature (BCS) energy gap (2Δ0) of UPt3. The surface resistance shows a change in slope as the signature of TC and has a significantly weaker temperature dependence in the superconducting state than would be predicted by the Mattis-Bardeen theory. At higher frequencies, the slope tends to change by a smaller amount. No indication of collective modes at any of the frequencies was observed down to the lowest temperatures measured (∼0.1 K).

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DO - 10.1016/S0375-9601(99)00520-4

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VL - 260

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JO - Physics Letters, Section A: General, Atomic and Solid State Physics

JF - Physics Letters, Section A: General, Atomic and Solid State Physics

IS - 5

ER -

Microwave surface resistance measurements on the heavy fermion superconductor UPt₃

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